Arrow- To change the arrow you have to open Dokan theme/includes/wc-temlate.php and search this line 'delimiter' => ' <i class="fa fa-angle-right"></i> ', you have to rewrite this line as 'delimiter' => ' <i class="fa fa-angle-left"></i> ',

2nd- I have to discuss with my developer about this . Please allow me some time to discuss with them. I will be back to you very soon with the result.

You have to open Doan/classes/ajax.php. In line number 80 you will see this line- $seller = sprintf( __( '<strong>Seller:</strong> %s ', 'dokan' ), $info['store_name'] );. You have to replace this line with this line-$seller = sprintf( __( '<br><strong>Seller:</strong> %s ', 'dokan' ), $info['store_name'] );.